Fuel cooler?
Fuel cooler? I have been watching Engine Masters, and I just saw the episode that shows that cooler fuel is better. With that in mind, would a fan powered cooler be beneficial if I am running two pumps?
I am thinking 900 GPH flow capacity
I am thinking 900 GPH flow capacity
Last edited by FCar2000TA; Jun 14, 2022 at 04:17 PM.
I think a couple other things have to be considered.
I have one because I run a return style set up and a relatively small (3.5 gal ) fuel cell.
The fuel coming back is fairly warm, and in such a small volume tank, I felt it may be an issue.
If I still had a 15 gal tank, not so much.
I have one because I run a return style set up and a relatively small (3.5 gal ) fuel cell.
The fuel coming back is fairly warm, and in such a small volume tank, I felt it may be an issue.
If I still had a 15 gal tank, not so much.
Here is the thread:
https://ls1tech.com/forums/fueling-injection/1941503-fuel-heating-caused-1-vs-2-pumps-test-results-inside.html
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Why of course, pumps produce heat, and if you keep circulating the fuel through one/them, of course it'll eventually warm up. And also of course, adding a "cool can" will make the fuel denser. But with EFI, the ECM will just add a bit more fuel if it's less dense, and the O2 sensors tell it that it isn't reaching the target A/F ratio, so it's that much less critical anyway. Carbs of course couldn't be tuned that way, back in the day.
And don't forget also, higher temp fuel atomizes better, therefore burns better. There's more to it than just its density.
That's kinda not what you asked though. You asked if any improvement could be made to (I assume) YOUR car by cooling the fuel with a fuel-air cooler rig of some sort. Best way to know that is, see what the fuel temp is now, and compare to whatever lower temp you could possibly bring it to, with a free-air cooler like you propose. If it's only a ° or 2 above ambient to begin with, then there's not a whole lot of there there to go after.
And don't forget also, higher temp fuel atomizes better, therefore burns better. There's more to it than just its density.
That's kinda not what you asked though. You asked if any improvement could be made to (I assume) YOUR car by cooling the fuel with a fuel-air cooler rig of some sort. Best way to know that is, see what the fuel temp is now, and compare to whatever lower temp you could possibly bring it to, with a free-air cooler like you propose. If it's only a ° or 2 above ambient to begin with, then there's not a whole lot of there there to go after.
Why of course, pumps produce heat, and if you keep circulating the fuel through one/them, of course it'll eventually warm up. And also of course, adding a "cool can" will make the fuel denser. But with EFI, the ECM will just add a bit more fuel if it's less dense, and the O2 sensors tell it that it isn't reaching the target A/F ratio, so it's that much less critical anyway. Carbs of course couldn't be tuned that way, back in the day.
And don't forget also, higher temp fuel atomizes better, therefore burns better. There's more to it than just its density.
That's kinda not what you asked though. You asked if any improvement could be made to (I assume) YOUR car by cooling the fuel with a fuel-air cooler rig of some sort. Best way to know that is, see what the fuel temp is now, and compare to whatever lower temp you could possibly bring it to, with a free-air cooler like you propose. If it's only a ° or 2 above ambient to begin with, then there's not a whole lot of there there to go after.
And don't forget also, higher temp fuel atomizes better, therefore burns better. There's more to it than just its density.
That's kinda not what you asked though. You asked if any improvement could be made to (I assume) YOUR car by cooling the fuel with a fuel-air cooler rig of some sort. Best way to know that is, see what the fuel temp is now, and compare to whatever lower temp you could possibly bring it to, with a free-air cooler like you propose. If it's only a ° or 2 above ambient to begin with, then there's not a whole lot of there there to go after.
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Last edited by FCar2000TA; Jun 15, 2022 at 07:13 PM.
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I was told years ago…never seen one myself…that BMW runs their fuel lines through an apparatus that, when the A/C is on, super cools the fuel lines. Is it true? No idea. Great idea though.
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Don't know about fuel lines on the BMW but mine have had Water cooled power steering and a cooler loop for the alternator..
I suspect it would be the V8/V10 cars due to under hood heat on those or specific M models.
Cheers
I suspect it would be the V8/V10 cars due to under hood heat on those or specific M models.
Cheers
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Why? Well, two things. I have never seen such a system on a BMW, though my experience is slightly limited, and more significantly I have never heard anyone complaining that this mythical system broke or started leaking immediately after their warranty expired.
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I have confidence that BMW doesn't have such a system.
Why? Well, two things. I have never seen such a system on a BMW, though my experience is slightly limited, and more significantly I have never heard anyone complaining that this mythical system broke or started leaking immediately after their warranty expired.
Why? Well, two things. I have never seen such a system on a BMW, though my experience is slightly limited, and more significantly I have never heard anyone complaining that this mythical system broke or started leaking immediately after their warranty expired.
So I heard about this way back. I had a friend who had an ‘87 or ‘88 M5 and he told me that the car had this “fuel cooler” that worked by cooling the fuel lines utilizing a “manifold” or something like that. Apparently the fuel lines run through this, and when the A/C is on, the fuel is cooled. For the first time, I just now looked into this, and it’s a real thing. Apparently BMW and Mercedes tried this for a couple years. Over on the Bimmer forums, there’s lots of talk about this, but I didn’t spend enough time reading to see if it actually helped or not. My friend always talked about how “fast” his car was, but I never drove it or even rode with him. His driving left a “little bit to be desired” for me.
I must say, the idea is genius, however.
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No, your spot on there, for sure.
So I heard about this way back. I had a friend who had an ‘87 or ‘88 M5 and he told me that the car had this “fuel cooler” that worked by cooling the fuel lines utilizing a “manifold” or something like that. Apparently the fuel lines run through this, and when the A/C is on, the fuel is cooled. For the first time, I just now looked into this, and it’s a real thing. Apparently BMW and Mercedes tried this for a couple years. Over on the Bimmer forums, there’s lots of talk about this, but I didn’t spend enough time reading to see if it actually helped or not. My friend always talked about how “fast” his car was, but I never drove it or even rode with him. His driving left a “little bit to be desired” for me.
I must say, the idea is genius, however.
So I heard about this way back. I had a friend who had an ‘87 or ‘88 M5 and he told me that the car had this “fuel cooler” that worked by cooling the fuel lines utilizing a “manifold” or something like that. Apparently the fuel lines run through this, and when the A/C is on, the fuel is cooled. For the first time, I just now looked into this, and it’s a real thing. Apparently BMW and Mercedes tried this for a couple years. Over on the Bimmer forums, there’s lots of talk about this, but I didn’t spend enough time reading to see if it actually helped or not. My friend always talked about how “fast” his car was, but I never drove it or even rode with him. His driving left a “little bit to be desired” for me.
I must say, the idea is genius, however.
Find a good PWM power supply for your fuel system. Not generating excess heat is better than cooling it off. Remember Colin Chapman. Simplify, and add lightness.
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Not directly. You would have to power the PWM power supply, then use some sort of sensor to let it determine how hard to drive your fuel pump. This could be based on fuel pressure, boost pressure, rpm, afr, or phase of the moon. You decide.